Teixeira, GGlen, RCarrapico, F2015-12-302015-12-302002GARCIA DE ORTA, SéRIE BOTâNICA. - Vol. 16, n. 1-2 (2002), p. 33-37http://hdl.handle.net/10451/22036application/pdfengMegaspore apparatus ultrastructure in Azolla pinnata R. Br. from South Africajournal article